package com.gaofeng.day14;

public class demo05 {
    public static void main(String[] args) {

        int[] arr = {1,2,3};
        String str = arrToString(arr);
        System.out.println(str);

    }

    public  static  String arrToString(int[] arr){
        StringBuilder sb = new StringBuilder();

        sb.append("[");
        for (int i = 0; i < arr.length; i++) {
            if(i == arr.length-1){
                sb.append(arr[i]);
            }else{
                sb.append(arr[i]).append(",");
            }
        }
        sb.append("]");
        return sb.toString();
    }
}
